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Related Experiment Videos

Suppressor mechanisms in tumor immunity.

G T Nepom, I Hellström, K E Hellström

    Experientia
    |March 15, 1983
    PubMed
    Summary

    Tumor immunity can be suppressed by T cells, similar to other immune responses. A proposed model details a regulatory pathway involving specific T cells and factors that control tumor antigen immunity.

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    Genes and immunity·2010

    Area of Science:

    • Immunology
    • Cancer Immunology
    • T cell regulation

    Background:

    • T cell-mediated suppression plays a role in tumor immunity.
    • Similarities exist between tumor immunity suppression and immune responses to haptens and polypeptides.

    Purpose of the Study:

    • To propose a cell interaction model for the regulatory pathway of tumor antigen immunity suppression.
    • To elucidate the roles of specific T cell subsets and suppressor factors in this process.

    Main Methods:

    • Development of a conceptual model based on existing immunological parallels.
    • Characterization of suppressor factors (TsF) produced by T cells.

    Main Results:

    • A pathway is proposed where tumor antigen triggers inducer T cells (Tsi) to activate suppressor effector cells (Tse).
    • Suppressor effector cells (Tse) are specific for Tsi idiotype or antigen complexes but mediate non-specific suppression.
    • Tumor antigen-specific suppressor factors (TsF) are crucial for cell communication and possess tumor-specific determinants.

    Conclusions:

    • The proposed model provides a framework for understanding T cell-mediated suppression of tumor immunity.
    • Suppressor factors (TsF) are key mediators in the regulatory network of tumor immune suppression.

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